DS90UB927-Q1 Datasheet, PDF (49/56 Pages) Texas Instruments – 5MHz - 85MHz 24-bit Color FPD-Link III Serializer with Bidirectional Control Channel

DS90UB927-Q1, DS90UB927Q, DS90UB927Q-Q1
www.ti.com
Applications Information
SNLS416B – JUNE 2012
DISPLAY APPLICATION
The DS90UB927Q, in conjunction with the DS90UB928Q or DS90UH926Q, is intended for interface between a
host (graphics processor) and a display, supporting 24-bit color depth (RGB888) and high definition (720p) digital
video format. It can receive an 8-bit RGB stream with a pixel clock rate up to 85 MHz together with three control
bits (VS, HS and DE) and four I2S audio streams.
TYPICAL APPLICATION CONNECTION
Figure 29 shows a typical application of the DS90UB927Q serializer for an 85 MHz 24-bit Color Display
Application. The 5 LVDS input pairs require external 100Ω terminations. The CML outputs must have an external
0.1µF AC coupling capacitor on the high speed serial lines. The serializer has internal CML termination on its
high speed outputs.
Bypass capacitors should be placed near the power supply pins. At a minimum, four (4) 4.7µF capacitors should
be used for local device bypassing. Ferrite beads are placed on the two sets of supply pins (VDD33 and VDDIO)
for effective noise suppression. The interface to the graphics source is LVDS. The VDDIO pins may be
connected to 3.3V or 1.8V. A capacitor and resistor are placed on the PDB pin to delay the enabling of the
device until power is stable.
3.3V or 1.8V (VDDIO)
DS90UB927Q
3.3V (VDD33)
VDDIO
VDD33_A
FB1
C6
C4
FB2
VDDIO
C7
VDD33_B
C5
FPD-Link
Interface
CAPLVD12
CAPL12
C11
C8 C9
CAPP12
C12
100:
100:
100:
100:
100:
RxCLKIN-
RxCLKIN+
RxIN3-
RxIN3+
RxIN2-
RxIN2+
RxIN1-
RxIN1+
RxIN0-
RxIN0+
VDD33 VDDIO
R4
R5
C13
INTB
PDB
CAPHS12
C10
C1
DOUT+
DOUT-
CMF
C2
C3
MAPSEL
BKWD
LFMODE
REPEAT
IDx
SCL
SDA
VDD33
R1
R2
I2S_CLK
4
I2S_WC
I2S_Dx
RESx
DAP (GND)
Serial
FPD-Link III
Interface
LVCMOS
Control
Interface
Notes:
FB1-FB2: Impedance = 1k: @100MHz
Low DC resistance (<1:)
C1-C3 = 0.1 PF
(50 WV; C1, C2: 0402; C3: 0603)
C4-C12 = 4.7 PF
C13 = >10 PF
R1/R2: see IDx Resistor Value Table
R4 = 10k:
R5= 4.7k:
Figure 29. Typical Connection Diagram
Copyright © 2012, Texas Instruments Incorporated
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